Garmin GPSMAP 3206 Owner's Manual

Also see for GPSMAP 3206 - Marine GPS Receiver: Installation instructions Install guide Installation instructions Important safety information Quick reference guide

Contents

Garmin GPSMAP 3206 Owner's Manual Manual pdf 91 page image

GPSMAP 3206/3210 Owner’s Manual 3usIng sonar > sonar tabsonarGeneral Sub TabUse the General sub tab to select the water type, depth number, automatic scrollspeed limit, scale, keel offset, and transducer type. The available General sub taboptions are as follows:Auto Gain—controls the aggressiveness of the Auto Gain when the Gainoption is set to Auto. The higher the setting, the greater the number oftargets appear on the screen. The lower the setting, the less clutter on thescreen. The settings are low, Medium (default), and high.Auto Color Gain—controls what colors are applied to the objects on thescreen when the Color Gain option is set to Auto. Color DCG™ is basedon depth and makes it easier to spot subtle changes in bottom conditionsor fish sizes. DynaColor™ (default) represents the latest in sonar datapresentation and is recommended for all applications. The presentation isbased on bottom strength. It makes the bottom and the fish easier to see andrequires fewer adjustments.Automatic Scroll Speed limit—automatically adjusts the Scroll ratewith the speed of your vessel. Enter your maximum cruising speed, andthe scroll rate adjusts to 100% when you reach that speed. One half of thatspeed produces a 50% scroll rate, and so on. The default is 30.0 kt.Keel Offset—allows you to offset the surface reading for the depth of akeel. This makes it possible to measure depth from the bottom of your keelinstead of from a transducer’s location near the water line. Enter a positivenumber to offset for a keel. You can also enter a negative number tocompensate for a large vessel that may draw several feet of water, requiringthe transducer to be submerged if you want to measure from the water line.The Keel Offset is reflected in the depth reading.••••Transducer at surface.Enter (+) a postvenumber to show depthfrom bottom of keel.Transducer at bottom of keel.Enter (-) a negatve number toshow depth from surface.Transducer Type—allows you to specify what type of transducer you areusing, either Dual Beam or Dual Frequency.Custom Range—allows you to specify a custom viewing range or scale.When On, this range appears as Custom in the Range setting. The leftvalue is the top of the scale and the right value is the bottom of the scale.Calibrate Water Speed—this is available only if you are using a speed-capable transducer/sensor. Calibration is required to ensure that the WaterSpeed shown on your unit is accurate. The unit automatically uses the GPSground speed, if it is available, for comparison on the calibration. If a GPSground speed is not available, use either your boat’s speedometer reading(not always accurate) or a stopwatch to determine your speed over a certaindistance (distance / time = speed). It is recommended that you calibrate inwater having little or no current.•••